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Remote communication
M12756-1 v12
Table 145. Line data communication module
Characteristic
Range or value
Type of LDCM
Short range (SR)
Medium range (MR)
Long range (LR)
Type of fiber
Multi-mode fiber
glass 62.5/125 µm
Multi-mode fiber
glass 50/125 µm
Single-mode fiber
glass 9/125 µm
Single-mode fiber
glass 9/125 µm
Peak Emission Wave length
Nominal
Maximum
Minimum
820 nm
865 nm
792 nm
1310 nm
1330 nm
1290 nm
1550 nm
1580 nm
1520 nm
Optical budget
Multi-mode fiber glass 62.5/125
m
m
18.8 dB (typical
distance about 3
km/2 mile *)
26.8 dB (typical
distance 80 km/50
mile *)
28.7 dB (typical
distance 120 km/68
mile *)
Multi-mode fiber glass 50/125
m
m
11.5 dB (typical
distance about 2
km/1 mile *)
Optical connector
Type ST
Type FC/PC
Type FC/PC
Protocol
C37.94
C37.94
implementation **)
C37.94
implementation **)
Data transmission
Synchronous
Synchronous
Synchronous
Transmission rate / Data rate
64 kbit/s
64 kbit/s
64 kbit/s
Clock source
Internal or derived
from received
signal
Internal or derived
from received
signal
Internal or derived
from received signal
*) depending on optical budget calculation
**) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
114
ABB
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